Pelvic brim

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Pelvic brim
The edge of the pelvic inlet (shown in red) is the pelvic brim
Diameters of superior aperture of lesser pelvis -- female. (Pelvic brim is not labeled, but is identifiable as the central opening at the top.)
Identifiers
FMA	224780
Anatomical terms of bone [edit on Wikidata]

The pelvic brim is the edge of the pelvic inlet. It is an approximately butterfly-shaped line passing through the prominence of the sacrum, the arcuate and pectineal lines, and the upper margin of the pubic symphysis.